Phathom Pharmaceuticals(PHAT) - 2025 Q3 - Quarterly Results

Exhibit 99.1 Phathom Pharmaceuticals Reports Third Quarter 2025 Financial Results and Provides Business Update FLORHAM PARK, N.J., October 30, 2025 — Phathom Pharmaceuticals, Inc. (Nasdaq: PHAT), a biopharmaceutical company focused on developing and commercializing novel treatments for gastrointestinal (GI) diseases, today reported financial results for the third quarter ended September 30, 2025, and provided a business update. "Our performance this quarter reinforces our belief in the strength of our GI-fo ...